EPA Method 200.8 Calibration Standard 2

13C3-Caffeine, 10mg

4-Hydroxy-2',3,5,5'-tetrachlorobiphenyl, 10mg

Sulfur Calibration Mixtures: Di-n-butyl sulfide in Heavy White Oil (less than 20mg/kg S) Unit : 10mL screw-capped bottle Light White Mineral Oil Heavy White Mineral Oil (20 cSt at 40°C) (70 cSt at 40°C)